I too was suggested the scs. I then went for a couple more opinions. I chose for myself not to do it. One of my pain doctors though it may actually increase my pain. I also feared the spread to the area where it is implanted. I hate to say anything negative to you because I do know someone who did benefit from it.
Can you go for another opinion? I would also ask the doctor about if you got worse or this spread what would be done?
Did you do the ketamine infusions? Or is it oral you are taking? If you do the scs I too hope you get relief. It sounds like you have been through a lot and I can understand the point you are at cause I am in similar place of needing to do something more.